We use a specialized radio receiver and antenna to locate carp that have previously been implanted with radiotransmitters. This is especially important to us when we need to locate aggregations of carp during winter months so commercial fishermen can remove them.
Carp are very mobile. In the spring, large numbers of carp leave the lakes to move to distant marshes to spawn, and then come back in early summer. In winter, carp gather in specific areas of lakes to form tight aggregations under the ice. We use telemetry to monitor springtime spawning migrations and to locate sites where carp aggregate under the ice. Exploiting these behaviors is important in successful carp management. For example, seining can be used to effectively remove winter aggregations of carp.